UCF STIG Viewer Logo

The Juniper device must be configured to produce audit log records containing sufficient information to establish what type of event occurred.


Overview

Finding ID Version Rule ID IA Controls Severity
V-253889 JUEX-NM-000120 SV-253889r843700_rule Medium
Description
It is essential for security personnel to know what is being done, what was attempted, where it was done, when it was done, and by whom it was done to compile an accurate risk assessment. Associating event types with detected events in the application and audit logs provides a means of investigating an attack; recognizing resource utilization or capacity thresholds; or identifying an improperly configured network device. Without this capability, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack.
STIG Date
Juniper EX Series Switches Network Device Management Security Technical Implementation Guide 2022-08-31

Details

Check Text ( C-57341r843698_chk )
Determine if the network device produces audit log records containing sufficient information to establish what type of event occurred.

Junos standard event log messages are configurable for time format, inclusion of logging facility and severity levels, and format. Setting "structured-data" automatically includes "explicit-priority" and "time-format year millisecond". Verify logging is enabled.

[edit system]
syslog {
host {
any info;
structured-data; <<< Includes 'explicit-priority' and 'time-format'
}
host {
any info;
explicit-priority; <<< Includes logging facility and severity in standard format
}
file {
any info; <<< Uses only standard format
}
time-format year; <<< Applied only to standard format
}
Note: In the example, events sent to the first external syslog server include the year and time is expressed in milliseconds. The second syslog server and the file both include the year, but time is expressed in seconds.

If the network device does not produce audit log records containing sufficient information to establish what type of event occurred, this is a finding.
Fix Text (F-57292r843699_fix)
Configure the network device to produce audit log records containing sufficient information to establish what type of event occurred.

set system syslog host any info
set system syslog host structured-data <<< Includes the 'explicit-priority' and 'time-format year millisecond' directives
set system syslog file any info
set system syslog file structured-data <<< Includes the 'explicit-priority' and 'time-format year millisecond' directives
-or-
set system syslog host any info
set system syslog host explicit-priority <<< Only if log level and severity are required
set system syslog file any info
set system syslog file explicit-priority <<< Only if log level and severity are required
set system syslog time-format year